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1.
Radiography (Lond) ; 30(3): 920-925, 2024 May.
Article in English | MEDLINE | ID: mdl-38631102

ABSTRACT

INTRODUCTION: In the UK it is commonplace for patients completing radiotherapy to be invited to ring a bell as a form of celebration. The project aimed to explore the experiences of the end of treatment bell from the perspective of patients who had received treatment for cancer, and therapeutic radiographers who treat patients. The study also aimed to consider possible alternative methods of commemorating the EoT, considering the needs of patients, family members and healthcare professionals. METHODS: Online focus groups were held with patients (n = 5) and therapeutic radiographers (n = 4) in December 2020; a joint online event (n = 6) was held in March 2022. They were all facilitated by two members of the research team. Thematic analysis was used for data analysis. RESULTS: Participants' views and experiences were mixed; however, there was a consensus that alternative forms of commemoration should be available to meet patients' diverse needs. Features of a specification were considered and suggestions made for alternative practices, with a focus upon patients' transition needs after radiotherapy has ended. CONCLUSION: The results indicate that departments should consider the harms as well as the benefits conferred by the EoT bell and explore alternative ways to mark an episode of treatment. IMPLICATIONS FOR PRACTICE: A one-size-fits-all approach is not appropriate in relation to marking the end of an episode of treatment.


Subject(s)
Focus Groups , Neoplasms , Humans , Neoplasms/radiotherapy , United Kingdom , Female , Radiotherapy/methods , Male
2.
Radiography (Lond) ; 30(3): 978-985, 2024 May.
Article in English | MEDLINE | ID: mdl-38663217

ABSTRACT

INTRODUCTION: The standard toxicity tools adopted for assessing Radiation Induced Skin Reactions (RISR) do not currently reflect how skin changes occur across all skin tones. A one size fits all approach is adopted currently for RISR assessment. The aim of this study was to understand what evidence-based practice and RISR tools are being used across the therapeutic radiography workforce and the levels of confidence in using these tools. METHODS: A survey using Likert scales to assess confidence in RISR assessment and management was made available to 77 departments in the UK between August-November 2021. Descriptive statistics were used to understand respondents' confidence in assessing, managing, and teaching RISR between white, brown, and black skin tones; Fisher's exact test was used to assess the significance of differences between groups. RESULTS: Complete responses were received from 406 therapeutic radiographers. Radiation Therapy Oncology Group (RTOG) was the most used RISR assessment tool (58% of respondents n = 237). Most respondents (74.2% n = 303) reported use of locally produced patient information on skin care, rather than the Society and College of Radiographers evidence-based patient leaflets. Confidence in assessing and managing RISR in white skin was higher than that in brown and black skin. Similarly, confidence was higher in teaching of appropriate RISR assessment and management in white skin tones when compared to brown and black skin. CONCLUSION: White skin tones appear to be more confidently assessed and managed for RISR along with taught appropriate assessment and management, than brown and black skin tones in the sample of the workforce that responded. IMPLICATIONS FOR PRACTICE: A greater understanding of the reasons for these differences is required but this study aims to instigate change and positive growth within this area.


Subject(s)
Radiodermatitis , Humans , United Kingdom , Surveys and Questionnaires , Clinical Competence
4.
Clin Oncol (R Coll Radiol) ; 35(12): 801-810, 2023 12.
Article in English | MEDLINE | ID: mdl-37777357

ABSTRACT

AIMS: Despite the breast being a mobile organ, there is currently no standard suitable immobilisation device to optimise radiotherapy for women with larger breasts treated after a wide local excision. The SuPPORT 4 All (S4A) bra was co-designed with patients and radiotherapy professionals. The purpose of this study was to test the feasibility of using the S4A bra in the existing breast cancer radiotherapy pathway. MATERIALS AND METHODS: A randomised feasibility trial was conducted in a single institution; the primary feasibility endpoint was the recruitment of 50 participants. Efficacy endpoints were also tested, including assessment of skin reactions, dose to organs at risk and patient comfort. Fifty women were randomised to receive either standard radiotherapy with no immobilisation (control) or radiotherapy with the S4A bra (intervention). A separate planning study was undertaken on the cases randomised to receive the S4A bra. Participants in the intervention arm (S4A bra) underwent two planning computed tomography scans, one with the bra on and one without the bra; allowing direct comparison of organs at risk data for S4A bra versus no bra. RESULTS: All women who started radiotherapy wearing the S4A bra completed treatment with the bra; patient comfort did not change across the 3 weeks of treatment. Positional accuracy using the bra was comparable with existing published accuracy for methods without immobilisation. The mean ipsilateral lung doses showed some improvement when positioning with the S4A bra was compared with the no bra set-up (3.72 Gy versus 4.85 Gy for right-sided cases, 3.23 Gy versus 3.62 Gy for left-sided cases). CONCLUSIONS: The S4A bra is feasible to use in the radiotherapy pathway with good patient adherence. The S4A bra has potential to reduce dose to organs at risk (specifically ipsilateral lung dose) while maintaining good breast tissue coverage, and improved patient dignity, warranting further investigation on a larger scale.


Subject(s)
Breast Neoplasms , Breast , Humans , Female , Radiotherapy Dosage , Feasibility Studies , Radiotherapy Planning, Computer-Assisted/methods , Lung , Breast Neoplasms/radiotherapy
5.
Radiography (Lond) ; 28(1): 232-239, 2022 02.
Article in English | MEDLINE | ID: mdl-34649789

ABSTRACT

INTRODUCTION: Radiation induced skin reactions (RISR) are a common adverse effect of radiotherapy that can impact on patient quality of life. The aim of this systematic review was to identify new research evidence on interventions for RISR to guide health practitioners on best practice skin care for people receiving radiotherapy. METHODS: A narrative systematic review was adopted including published research since 2014. The MESH search terms used in the 2014 College of Radiographers skin care systematic review were supplemented with terms identified through a pearl growing search technique. RESULTS: Thirty-three studies were identified and reviewed, 13(39.4%) were assessed as having a high risk of bias 6(18.2%) moderate risk of bias, and 13(39.4%) low risk of bias; one pilot study was not assessed. Twenty-one of the studies were randomised controlled trials, 2 feasibility studies, 9 non-randomised trials, and 1 a pilot study. CONCLUSION: Evidence from well conducted studies identified prophylactic use of steroid cream for patients, at high risk of RISR, as being the most efficacious in reducing acute skin reactions. Further research is needed on photo biomodulation therapy, studied within standard dose fractionation schedules, before it is recommended for use in practice. There is insufficient evidence to support the use of barrier films or any topical emollients currently in practice to reduce RISRs. Despite the number of new studies in this area there is limited good comparative research of RISR that accounts for predictive risk and new radiotherapy techniques. IMPLICATIONS FOR PRACTICE: Practitioners are encouraged to risk assess patients prior to radiotherapy to guide interventions and record and monitor patient skin toxicity regularly during treatment, comparing toxicity changes with scores recorded at baseline and support patient self-monitoring of skin reactions.


Subject(s)
Quality of Life , Dose Fractionation, Radiation , Humans , Pilot Projects , Randomized Controlled Trials as Topic
6.
Radiography (Lond) ; 27(2): 352-359, 2021 05.
Article in English | MEDLINE | ID: mdl-33036914

ABSTRACT

INTRODUCTION: Breast cancer is a global health problem with 2.09 million cases of breast cancer diagnosed worldwide in 2018. With an increase in breast cancer survival attention has now focussed on the impact treatment side effects can have on the quality of life for women during survivorship. The aim of the SuPPORT 4 All project is to develop a support bra for use during radiotherapy, that can reduce normal tissue toxicity (for women with larger breasts) and provide accuracy, dignity and modesty for all women. The first stage of the project involved a co-design process to understand the current patient experience where no support bra or modesty device is used. METHOD: A participatory co-design methodology was adopted. Workshops were held with patient representatives (n = 9) to seek understanding of experience during radiotherapy; a total of three workshops over 4 h. The workshops were audio recorded and framework analysis was adopted to identify key patient experiences. RESULTS: Twelve categories and twenty-six sub categories were identified specific to patient experience. Patient concerns focussed on information provision, Healthcare Practitioner (HCP) knowledge of breast lymphoedema, lack of choice, experiences of being naked, and feelings of disempowerment. CONCLUSIONS: A number of areas were identified that had negative effects on overall patient experience. IMPLICATIONS FOR PRACTICE: Practitioners should consider patient dignity when configuring services to support patient needs regarding undressing, outside or inside the linear accelerator room. Additionally, practitioners should have an understanding of the impact permanent tattoos may have on some patients' wellbeing and the impact that breast lymphoedema has on patient quality of life. Practitioners should also consider methods to encourage patient empowerment during radiotherapy; supporting patient self-monitoring of side-effects may be one way to facilitate this.


Subject(s)
Breast Neoplasms , Breast Neoplasms/radiotherapy , Female , Humans , Patient Outcome Assessment , Quality of Life
7.
Radiography (Lond) ; 25(1): 4-9, 2019 02.
Article in English | MEDLINE | ID: mdl-30599829

ABSTRACT

INTRODUCTION: In the current clinical working environment it is important that therapeutic radiography students are fully prepared not just clinically but emotionally for a working professional life. Mindfulness has shown promise, as a self-care strategy, in the improvement of burnout, resilience and compassion fatigue in other professions; however, it has not been used with therapeutic radiography students. METHODS: Eight pre-registration therapeutic radiography students were recruited to undergo a five week mindfulness course; six students from the year below were recruited to act as a control arm (no mindfulness). Data was collected using a series of validated tools at baseline, week five, month three and 12 months after the start of the study: RESULTS: The MBI-SS scale demonstrated 29% of the sample experienced emotional exhaustion and 43% increased cynicism. The other tools showed a positive trend with the intervention; however, these were not statistically significant. CONCLUSION: Although no statistically significant differences were demonstrated between the study arms, some interesting trends have been noted. The key finding was the identification of burnout experienced by almost a third of the study sample. This suggests that a new area of study is warranted to further investigate the factors contributing to burnout in the student population.


Subject(s)
Burnout, Psychological/prevention & control , Compassion Fatigue/prevention & control , Mindfulness/methods , Radiology/education , Resilience, Psychological , Students, Medical/psychology , Adult , Burnout, Psychological/psychology , Compassion Fatigue/psychology , Female , Humans , Male , Outcome Assessment, Health Care , Pilot Projects , Radiography , Young Adult
8.
Radiography (Lond) ; 24(2): 98-103, 2018 May.
Article in English | MEDLINE | ID: mdl-29605120

ABSTRACT

INTRODUCTION: The primary aim of this study was to examine the impact of deep inspiration breath-hold (DIBH) amplitude on subsequent mean heart dose and V30 during radiotherapy. The secondary aim was to investigate if patient age influenced DIBH amplitude. METHOD: A retrospective study of 30 patients with left-sided breast cancer was completed. Patients were randomly selected from the total number of patients dual scanned in free breathing (FB) and DIBH over a 2-year period. Plans were retrospectively virtually simulated and statistical analysis performed. RESULTS: All patients achieved decreased V30 and mean cardiac dose using DIBH. A positive correlation was found between DIBH amplitude and cardiac V30 dose reduction (p = 0.007, R = 0.48). Ratio of amplitude increase from FB to DIBH and cardiac V30 reduction was positively correlated and statistically significant (p = 0.04, R = 0.38); Ratio of amplitude increase of at least 15 times FB achieved 100% V30 dose reduction, however this was also achieved with ratio increase as low as 6.25 times FB. A statistically significant positive correlation was identified between DIBH amplitude and mean cardiac dose reduction (p = 0.003, R = 0.523). No correlation was found between patient age and amplitude ratio increase (p = 0.602, R = -0.099). CONCLUSION: A 100% reduction in cardiac V30 can be achieved with a DIBH amplitude increase of 15 times FB. A full reduction can also be achieved at much lower levels (6.25 times FB in current study); however there appears to be no pre-determining patient factors to identify this. DIBH amplitudes of 1 cm-4 cm reduce cardiac mean dose by at least 50%.


Subject(s)
Breath Holding , Heart/radiation effects , Unilateral Breast Neoplasms/radiotherapy , Adult , Female , Humans , Middle Aged , Organs at Risk , Radiotherapy Dosage , Retrospective Studies
10.
Br J Radiol ; 87(1039): 20130742, 2014 Jul.
Article in English | MEDLINE | ID: mdl-24786316

ABSTRACT

OBJECTIVE: Workforce planning reports identify a staff shortfall that jeopardizes the ability of UK radiotherapy centres to meet future demands. Obtaining an understanding of the work experiences of radiotherapy professionals will support the development of strategies to increase job satisfaction, productivity and effectiveness. METHODS: A quantitative survey assessed job satisfaction, attitudes to incident reporting, stress and burnout, opportunities for professional development, workload, retention and turnover. Clinical oncologists were not included, as the Royal College of Radiologists, London, UK, had recently assessed their members' satisfaction. All questions were taken from validated instruments or adapted from the "UK National Health Service Staff Survey". RESULTS: The survey yielded 658 completed responses (approximately 16% response rate), from public and private sectors. Over a third (36%) of respondents were classified as satisfied for job satisfaction with 11% dissatisfied and the remaining 53% ambivalent. A significant proportion of clinical staff (37.5%) report high emotional exhaustion. Presenteeism was an issue with 42.4% attending work despite feeling unable to fulfil their role. CONCLUSION: Radiotherapy professionals are prone to the effects of compassion fatigue and burnout. Attention must be paid to workload and its impact on practitioners' job satisfaction. Professional development that is supported and informed by a performance development review is a simple and effective means of enhancing satisfaction. Individuals have a responsibility to themselves and their colleagues as their behaviours and attitudes influence job satisfaction. ADVANCES IN KNOWLEDGE: This work identifies areas for future research to enhance the professional resilience of practitioners, in order to provide high-quality treatments.


Subject(s)
Burnout, Professional/epidemiology , Job Satisfaction , Radiology , Clinical Audit , Female , Humans , Male , Middle Aged , Physicians/statistics & numerical data , Physics , State Medicine , United Kingdom , Workload
11.
Br J Radiol ; 85(1017): e760-5, 2012 Sep.
Article in English | MEDLINE | ID: mdl-22253352

ABSTRACT

The 2007 UK National Radiotherapy Advisory Group report indicated that the number and type of staff available is one of the "rate-limiting" steps in improving productivity in radiotherapy departments. Retaining well-trained, satisfied staff is key to meeting the objectives of the report; burnout is an important factor linked to satisfaction and attrition. The results of a survey measuring burnout in a sample of radiotherapists (therapy radiographers) are presented and considered against norms for the health sector and burnout in therapists from Canada and the USA. Case study methodology was used studying six radiotherapy departments selected because of close geographical proximity and differing vacancy rates for radiotherapists. An anonymous survey of radiotherapists used the Maslach Burnout Inventory (MBI) and other workforce-related measures (e.g. job satisfaction scales, measures of professional plateau, intentions to leave, job characteristics and demographic data); the results of the burnout questionnaire alone are presented in this paper. A total of 97 completed questionnaires were returned (representing a 28% response rate). The average score for emotional exhaustion was higher than the MBI norms, with 38% of respondents reporting emotional exhaustion (an element of burnout). The data presented support and validated a previous qualitative study, and highlighted key areas of concern requiring further study. A correlation between burnout and job dissatisfaction and intention to leave was identified; managers may want to consider encouraging role extension and good leadership qualities in treatment unit leaders to minimise the potential for burnout.


Subject(s)
Burnout, Professional/epidemiology , Physicians/statistics & numerical data , Radiation Oncology/statistics & numerical data , Radiotherapy/statistics & numerical data , Adult , Aged , Female , Humans , Male , Middle Aged , Prevalence , Risk Factors , United Kingdom/epidemiology , Workforce
12.
Eur Surg Res ; 45(1): 50-9, 2010.
Article in English | MEDLINE | ID: mdl-20798546

ABSTRACT

Vessel wall trauma induces vascular remodeling processes including the development of intimal hyperplasia (IH). To assess the development of IH in human veins, we have used an ex vivo vein support system (EVVSS) allowing the perfusion of freshly isolated segments of saphenous veins in the presence of a pulsatile flow which reproduced arterial conditions regarding shear stress, flow rate and pressure during a period of 7 and 14 days. Compared to the corresponding freshly harvested human veins, histomorphometric analysis showed a significant increase in the intimal thickness which was already maximal after 7 days of perfusion. Expression of the endothelial marker CD31 demonstrated the presence of endothelium up to 14 days of perfusion. In our EVVSS model, the activity as well as the mRNA and protein expression levels of plasminogen activator inhibitor 1, the inhibitor of urokinase-type plasminogen activator (uPA) and tissue-type plasminogen activator (tPA), were increased after 7 days of perfusion, whereas the expression levels of tPA and uPA were not altered. No major change was observed between 7 and 14 days of perfusion. These data show that our newly developed EVVSS is a valuable setting to study ex vivo remodeling of human veins submitted to a pulsatile flow.


Subject(s)
Saphenous Vein/physiology , Aged , Blood Flow Velocity , Cell Culture Techniques/methods , Endothelium, Vascular/physiology , Female , Humans , Male , Perfusion/methods , Plasminogen Activator Inhibitor 1/genetics , Platelet Endothelial Cell Adhesion Molecule-1/immunology , Pulse , Saphenous Vein/cytology , Saphenous Vein/immunology , Saphenous Vein/pathology , Tissue Plasminogen Activator/genetics , Tissue and Organ Harvesting/methods , Tunica Media/pathology , Urokinase-Type Plasminogen Activator/genetics , Vascular Surgical Procedures
13.
Rev Med Suisse ; 5(209): 1432-6, 2009 Jun 24.
Article in French | MEDLINE | ID: mdl-19715021

ABSTRACT

Laparoscopic surgery has become a standard approach for many interventions, including oncologic surgery. Laparoscopic instruments have been developed to allow advanced surgical procedure. Imaging and computer assistance in virtual reality or robotic procedure will certainly improve access to this surgery.


Subject(s)
Laparoscopy/methods , Laparoscopy/trends , Digestive System Surgical Procedures , Humans , Robotics
14.
Rev Med Suisse ; 4(163): 1553-7, 2008 Jun 25.
Article in French | MEDLINE | ID: mdl-18672544

ABSTRACT

Laparoscopic cholecystectomy reduces postoperative pain, hospital stay and recovery in comparison with the open procedure. This approach allows to treat most of vesicular pathologies, as acute cholecystitis and choledocal lithiasis, with excellent results. Biliary tract injuries represent however the most feared complication. Concerning groin hernia pathology, two different laparoscopic approaches are described, as the trans-abdominal pre-peritoneal approach (TAPP) and the total extra-peritoneal approach (TEP). The first technique is easier to perform, but associated with more frequent significant intraabdominal morbidity. Results are comparable to the classic open Lichtenstein technique in term of reccurence. Laparoscopic approach could be associated with a lower chronic pain rate, but further studies should confirm this statement.


Subject(s)
Cholecystectomy, Laparoscopic , Hernia, Inguinal/surgery , Humans
15.
J Cardiovasc Surg (Torino) ; 47(4): 437-43, 2006 Aug.
Article in English | MEDLINE | ID: mdl-16953163

ABSTRACT

AIM: Chronic critical limb ischemia (CLI) often requires venous bypass grafting to distal arterial segments. However, graft patency is influenced by the length and quality of the graft and occasionally patients may have limited suitable veins. We investigated short distal bypass grafting from the superficial femoral or popliteal artery to the infrapopliteal, ankle or foot arteries, despite angiographic alterations of inflow vessels, providing that invasive pressure measurement at the site of the planned proximal anastomosis revealed an inflow-brachial pressure difference of

Subject(s)
Blood Vessel Prosthesis Implantation/methods , Femoral Artery/surgery , Ischemia/surgery , Leg/blood supply , Saphenous Vein/transplantation , Aged , Aged, 80 and over , Angiography, Digital Subtraction , Female , Femoral Artery/diagnostic imaging , Humans , Incidence , Ischemia/diagnostic imaging , Male , Middle Aged , Postoperative Complications/epidemiology , Retrospective Studies , Severity of Illness Index , Survival Rate , Transplantation, Autologous , Treatment Outcome , Ultrasonography, Doppler, Duplex
16.
Rev Med Suisse ; 2(70): 1572-6, 2006 Jun 14.
Article in French | MEDLINE | ID: mdl-16838723

ABSTRACT

In superficial venous insufficiency, surgery remains the treatment of choice. Endovenous therapies are a minimal invasive alternative, whose long-term results are not demonstrated yet. In the treatment of abdominal aortic aneurysm, endovascular repair (EVAR) and laparoscopic approach are comparatively studied with open repair, to define their precise indications. In occlusive arterial disease, endovascular treatment offers inferior results in term of durability and patency, however with a decrease in morbidity and mortality.


Subject(s)
Vascular Diseases/therapy , Humans
17.
Clin Oncol (R Coll Radiol) ; 18(3): 268-75, 2006 Apr.
Article in English | MEDLINE | ID: mdl-16605058

ABSTRACT

There is substantial evidence documenting the potential morbidity associated with radiotherapy in early breast cancer. An appraisal of current standard radiation practice is therefore necessary, given that women are surviving longer, have an improved quality of life, and are overcoming subsequent side-effects caused by postoperative irradiation. New technology allows the application of more complex approaches. This discussion paper considers some of the benefits of the widespread use of new complex approaches, such as intensity-modulated radiotherapy (IMRT) in the light of staffing and equipment shortfalls, and possible consequences on waiting times for treatment. The discussion is considered under the following themes: (1) which women with breast cancer benefit from complex treatment approaches? (2) What is the role of treatment accuracy in limiting morbidity? And (3) what is the potential effect of complex breast irradiation approaches on service delivery? In the UK, and globally, many departments are struggling to meet waiting-time guidelines. The use of more complex approaches for breast irradiation may increase this difficulty. However, a number of simple technical changes can be used to enhance efficacy and reduce levels of normal tissue morbidity. A sub-set of women who are at greatest risk from normal tissue morbidity or reduced cosmesis should be accurately defined in order to allow departments to plan their treatment strategies with optimal use of resources.


Subject(s)
Breast Neoplasms/radiotherapy , Radiotherapy Planning, Computer-Assisted/methods , Women's Health , Breast Neoplasms/surgery , Dose-Response Relationship, Radiation , Female , Humans , Mastectomy , Medical Oncology/organization & administration , Neoplasm Staging , Radiotherapy Planning, Computer-Assisted/instrumentation , Radiotherapy, Adjuvant , Radiotherapy, Intensity-Modulated/instrumentation , Radiotherapy, Intensity-Modulated/methods
18.
Praxis (Bern 1994) ; 95(12): 447-50, 2006 Mar 22.
Article in French | MEDLINE | ID: mdl-16602217

ABSTRACT

BACKGROUND: The superficial femoral vein (SFV) is a well-established alternative conduit for infra-inguinal reconstructivenous hypertension after SFV harvest may however result in significant morbidity. This study reports the efficiency of SFV as conduit for infra-inguinal reconstructions and characterize the anatomic and physiologic changes in harvest limbs and their relationship to the development of venous complications. METHODS: From May 1999 through November 2003, 23 SFV were harvested from 21 patients undergoing infra-inguinal reconstructions. Bypasses were controlled by regular duplex-ultrasound. The venous morbidity was assessed by measurements of leg circumferences, strain-gauge plethysmography and quality of life, investigated by the VEINES-QOL scale. RESULTS: At a mean follow-up of 10.4 months (range 1-56), primary, secondary patency and limb salvage rates of infra-inguinal bypasses using SFV are 71.4%, 76.2% and 85.7% respectively. No patient had major venous claudication. Oedema was significantly present in nine patients. Strain-gauge plethysmography showed outflow obstruction in all patients. The VEINES-QOL assessment showed no limitation in social and domestic activity, moderate complain about leg heaviness despite presence of oedema. CONCLUSION: The SFV harvest is a reliable conduit for infra-inguinal reconstructions and results in moderate venous morbidity in terms of functional consequences and quality of life.


Subject(s)
Femoral Vein , Leg/blood supply , Limb Salvage , Tissue and Organ Harvesting , Vascular Surgical Procedures , Aged , Aged, 80 and over , Blood Vessel Prosthesis , Blood Vessel Prosthesis Implantation , Female , Follow-Up Studies , Humans , Male , Middle Aged , Plethysmography, Impedance , Prospective Studies , Quality of Life , Risk Factors , Surveys and Questionnaires , Survival Analysis , Time Factors , Ultrasonography, Doppler, Duplex , Vascular Patency
19.
Clin Exp Immunol ; 141(3): 398-404, 2005 Sep.
Article in English | MEDLINE | ID: mdl-16045728

ABSTRACT

To investigate the dependence of individual immunological processes on DC, a transgenic mouse system (CD11c-DTR/GFP mice) has been developed that allows conditional depletion of CD11c+ DC in vivo through administration of diphtheria toxin. We have performed careful histological analysis of CD11c-DTR/GFP mice at different time points after diphtheria toxin injection and confirmed the transient depletion of CD11c+ cells from lymph nodes and spleen. Unexpectedly, the injection of diphtheria toxin completely depleted marginal zone and metallophilic M(Phi) from the spleen and their sinusoidal counterparts from the lymph nodes. This finding limits the use of CD11c-DTR/GFP mice for the analysis of the role of DC to models and read outs that are proven to be independent of marginal zone and sinusoidal M(Phi).


Subject(s)
CD11c Antigen/immunology , Dendritic Cells/immunology , Lymphoid Tissue/immunology , Macrophages/immunology , Receptors, Cell Surface , Animals , Antimetabolites/administration & dosage , Cell Count , Clodronic Acid/administration & dosage , Diphtheria Toxin/administration & dosage , Female , Flow Cytometry , Green Fluorescent Proteins/genetics , Heparin-binding EGF-like Growth Factor , Immunohistochemistry/methods , Intercellular Signaling Peptides and Proteins , Liposomes , Lymph Nodes/immunology , Male , Mice , Mice, Inbred C57BL , Mice, Transgenic , Microscopy, Fluorescence , Models, Animal , Phagocytosis , Spleen/immunology
20.
Eur Surg Res ; 36(5): 274-81, 2004.
Article in English | MEDLINE | ID: mdl-15359090

ABSTRACT

Intimal hyperplasia (IH) is a vessel wall remodeling process responsible of early failure after vascular surgery or endovascular interventions. An ex vivo perfusion was used to study human venous segments regarding functional, histomorphological, immunohistochemical and molecular alterations after 7 (group 1, n = 6) and 14 days (group 2, n = 6) of ex vivo perfusion. All vessel segments showed preserved smooth muscle function before and after perfusion. Histomorphometry revealed IH development which was more pronounced after 14 days rather than 7 days (p < 0.05). Expression of CD34, factor VIII, alpha-actin and MIB-1 was demonstrated in all segments from both groups indicating that muscular and endothelial integrity was preserved after ex vivo perfusion of up to 14 days. PAI-1 mRNA expression was significantly increased after perfusion (p < 0.05), suggesting that the endothelial fibrinolytic function may be modulated in this ex vivo perfusion model of human saphenous veins.


Subject(s)
Perfusion , Saphenous Vein/pathology , Saphenous Vein/physiopathology , Actins/metabolism , Antigens, CD34/metabolism , Blotting, Northern , Factor VIII/metabolism , Female , Humans , Hyperplasia , Immunohistochemistry , In Vitro Techniques , Ki-67 Antigen/metabolism , Male , Middle Aged , Nitroprusside/pharmacology , Norepinephrine/pharmacology , Perfusion/adverse effects , Plasminogen Activator Inhibitor 1/metabolism , Saphenous Vein/drug effects , Time Factors , Tunica Intima/pathology , Vasoconstriction , Vasoconstrictor Agents/pharmacology , Vasodilation , Vasodilator Agents/pharmacology
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